After anodizing treatment, aluminum and its alloy surface can obtain a dense film layer much thicker than the natural oxidation film. After the artificial oxidation membrane was closed, the amorphous oxidation membrane was transformed into a crystalline oxide membrane, and the pores were closed. Therefore, the surface luster of the metal could remain unchanged for a long time, the corrosion resistance and mechanical strength were improved, and the decorative appearance could be obtained by dyeing. The aluminum anodizing process is widely used in the surface treatment of aluminum products due to the permissible characteristics of aluminum and alloy products after anodizing.
Applications in the industry can be broadly divided into the following types:
(1) Prevention of rotten products:
Due to the proper closure of the film layer resulting from anodic oxidation, there is good stability in the atmosphere. Oxide film obtained in the normal process from the sulfuric acid solution, guest oxalate solution, or boronic acid solution has good corrosion resistance, such as daily aluminum pot, pot, washing machine liner, etc. The chromic acid oxidation method is especially suitable for aluminum coal joints and riveting parts.
(2) Protection - Decoration:
The oxidation film can adsorb a variety of organic dyes or inorganic pigments. All kinds of bright colors and patterns can be obtained on the oxide film. In recent years many new processes have appeared, such as one-time oxidation and multiple coloring, gift flower pattern, wood grain pattern, oxidation offset print transfer printing, porcelain oxidation, etc., to make the appearance of aluminum beautiful and pleasing to the eye. This color film is both decorative and corrosion resistant, such as lighters, gold pens, and crafts.
(3) As a hard grinding layer:
In either sulfuric acid or oxalic acid dissolution, the anodic oxidation process conditions can be adjusted. Obtain a thick, hard film layer, which uses the pores and absorption properties of the film layer to store selective oils. Conditions that are effectively applied to work in a friction state. It also has lubricating and wear-resistant features, such as engine cylinders, pistons, etc. of cars and tractors.
(4) As an insulating layer for electricity:
The oxidation layer of aluminum and its alloys has the characteristic of large resistance. The thickness of the film layer is proportional to the resistance, which is of practical significance as the insulation of electricity. It can be used as a dielectric for capacitors, or it can be used as an outer skin for cables. Insulating the surface to replace the rubber and plastic foreskin is popular abroad. The permeable voltage is 441V when the film thickness is 27.5um. If it is filled with phenol wall resin as a membrane hole, its permeable voltage can be increased by 2 times. In oxalic acid drop, when the film thickness increases, A high-quality insulating layer with a resistance of 200 Ω and a breakdown voltage of 980V can be obtained. Of course, the use of this feature can be used in other aspects, such as electrical appliances, in addition to wires.
(5) Spray paint, electroplating substrate:
Because of its porous properties and good adsorption capacity, the oxidized film has good binding force with the lacquer film and the organic film, it can be used as the paint layer.
(6) For modern architecture:
Due to the introduction of aluminum alloy electrolytic coloring technology, the application of electrolytic coloring in building aluminum profiles has increased day by day in recent years. It not only has bronze, black, red, etc. suitable for building tones. The abrasion resistance is better than that of conventional oxidation. It is not worth proposing that the abrasion resistance is very good. Electrolytically colored oxidized profiles can be used not only for building doors and windows but also for shop counters, shelves, etc.
Guangdong Zhonglian aluminum profile Co., Ltd. is a manufacturer of aluminium profile with well-equipped testing facilities and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in construction industry and other industries.Our products are widely recognized and trusted by users and can meet continuously changing economic and social needs.We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success!
